Sen. Scott Brown and Elizabeth Warren spar over income taxes

File photos | The RepublicanDemocratic U.S. Senate hopeful Elizabeth Warren, left, is facing Republican U.S. Sen. Scott Brown, right, in what is being billed as the costliest race in Senate history.

By STEVE LeBLANC, Associated Press

BOSTON (AP) — U.S. Sen. Scott Brown says he'll probably make public his tax returns for the last five or six years while his chief Democratic challenger Elizabeth Warren said she didn't voluntarily pay a higher state tax rate.

The Republican told WTKK-FM on Friday that he had nothing to hide, but didn't say when he might release the returns.

Warren said Friday that she would consider releasing more than the two years of tax returns she had previously said she would release if Brown did the same.

Warren also said she didn't voluntarily pay higher income taxes in Massachusetts, where taxpayers can opt to pay a higher 5.85 percent rate rather than the standard 5.3 percent.

The Brown campaign has called Warren "hypocritical" for supporting higher taxes on millionaires without saying if she paid the higher rate.